This
painting is called "The Madonna with Saint Giovannino". It was
painted in the 15th century by Domenico Ghirlandaio (1449-1494)
and hangs as part of the Loeser collection in the Palazzo Vecchio.
Above Mary's (left) shoulder is a disk shaped object. Below is
a blow up of this section and a man and his dog can clearly be
seen looking up at the object.

These
two objects (play video) are from part of a fresco entitled "The
Crucifixion"
and was painted in 1350. They are located above the altar at
the Visoki Decani Monestary in Kosovo, Yugoslavia.

These
two tapestries were created in the 14th century. Both depict the
life of Mary. Hat shaped objects can be clearly seen in both tapestries.
The one on the left was created in 1330. The one on the right
is entitled The Magnificent. Both are located at the french basillica
Notre-Dame in Beaune, Burgandy.

The
above picture depicts Jesus and Mary on what appear to be lenticular
clouds. The painting is entitled "The Miracle of the Snow" and
was painted by Masolino Da Panicale (1383-1440) and hangs at the
church of Santa Maria Maggiore, Florence, Italy.

I
don't know the titles/artists or where these two are displayed,
but I know the one on the left is 15th century !

The
above painting is by Paolo Uccello (1396-1475) and is entitled
"La Tebaide" (painted c.1460-1465). The blown up picture on the
right shows a red saucer shaped UFO seen near Jesus. It hangs
in the Academy of Florence.

The
above painting is by Carlo Crivelli (1430-1495) and is called
"The Annunciation with Saint Emidius" (1486) and hangs in the
National Gallery, London. A disk shaped object is shining a pencil
beam of light down onto the crown of Mary's head. A Blow up of
the object is next to the painting.

The
above is a painting on wood near the castle Conti Dotremond, Belgium.
Moses is receiving the tablets and several objects in the sky
are seen near by. Date and artist unknown

The
above picture is from a book entitled Prodigiorum Ac Ostentorum
Chronicon by Conrad Lycosthenes (1518-1561). Basel: Henricpteri,
1557. It depicts a UFO sighting in Arabia in 1479. The book is
held at the Australian Museum Research Library.

The
above image is entitled "The Assumption of the Virgin" by ANON.
Painted c.1490. Once again notice the discoidal clouds.

The
above image is of actual sighting that occurred in Nuremburg on
the 14th April 1561. It appeared in a local broadsheet and was
a woodcut by Hans Glasser. Held at the Wickiana Collection, Zurich
Central Library.

This
picture describes a UFO sighting over Basel, Switzerland in 1566.
It is held at the Wickiana Collection, Zurich Central Library

This
is a French medal apparently commemorating a UFO sighting of a
wheel like object in 1680. Artist/location unknown.

The
above painting is by Bonaventura Salimbeni entitled "Glorification
of the Eucharist", painted in 1600. Notice the Sputnik satellite
device. It hangs in the church of San Lorenzo in San Pietro.

More
wheels ! This picture shows a UFO sighting over Hamburg, Germany
4 November 1697. The objects were described as "two glowing wheels"

This
image is by flemish artist Aert De Gelder and is entitled "The
Baptism of Christ" It was painted in 1710 and hangs in the Fitzwilliam
Musuem, Cambridge. A disk shaped object is shining beams of light
down on John the Baptist and Jesus.

The
above illustration depicts a sighting that occurred at 9.45pm
on the evening of 18th August 1783 when four witnesses
on the terrace of Windsor Castle observed a luminous object in
the skies of the Home Counties of England. The sighting was recorded
the following year in the Philosophical Transactions of the
Royal Society. According to this report, witnesses observed
an "oblong cloud moving more or less parallel to the horizon.
Under this cloud could be seen a luminous object which soon became
spherical, brilliantly lit, which came to a halt; This strange
sphere seemed at first to be pale blue in colour but then its
luminosity increased and soon it set off again towards the east.
Then the object changed direction and moved parallel to the horizon
before disappearing to the south-east ; the light it gave out
was prodigious; it lit us everything on the ground." The image
was captured in this by Thomas Sandby (a founder of the Royal
Academy) and his brother Paul, both of whom witnessed the event.

These
a images from Kimberley, Australia. They are Australian Aborigine
cave paintings, possibly 5,000 years old. It is believed they
represent ET beings. Here is a link giving you more info on Aboriginal
beliefs